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Heater and image heating apparatus including the same

a heating apparatus and image technology, applied in the field of heaters and image heating apparatus including the same, can solve the problem of a larger amount of electric power consumption, and achieve the effect of suppressing electric power consumption

Active Publication Date: 2016-01-28
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to a heater that can reduce electricity consumption. This invention is particularly useful for an image heating apparatus that can also suppress electricity consumption in the heater.

Problems solved by technology

Particularly, a larger amount of a current flows into the electroconductive line connected with a large number of a plurality of heat generation resistors layers, so that an amount of electric power consumption is larger.

Method used

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  • Heater and image heating apparatus including the same
  • Heater and image heating apparatus including the same
  • Heater and image heating apparatus including the same

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

Image Forming Portion

[0027]FIG. 1 is a sectional view of the printer 1 which is the image forming apparatus of this embodiment. The printer 1 comprises an image forming station 10 and a fixing device 40, in which a toner image formed on the photosensitive drum 11 is transferred onto a sheet P, and is fixed on the sheet P, by which an image is formed on the sheet P. Referring to FIG. 1, the structures of the apparatus will be described in detail.

[0028]As shown in FIG. 1, the printer 1 includes image forming stations 10 for forming respective color toner images Y (yellow), M (magenta), C (cyan) and Bk (black). The image forming stations 10 includes respective photosensitive drums 11 (11Y, 11M, 11C, 11Bk) corresponding to Y, M, C, Bk colors are arranged in the order named from the left side. Around each drum 11, similar elements are provided as follows: a charger 12 (12Y, 12M, 12C, 12Bk); an exposure device 13 (13Y, 13M, 13C, 13Bk); a developing device 14 (14Y, 14M, 14C, 14Bk); a prima...

embodiment 2

[0121]A heater according to Embodiment 2 of the present invention will be described. FIG. 12 illustrates a structure of a heater 600 in this embodiment. FIG. 13 is an illustrates an effect in this embodiment. In Embodiment 1, the line width of the electroconductive line 640 is made thick compared with the line width of the electroconductive lines 650, 660. On the other hand, in Embodiment 2, in addition to the constitution of Embodiment 1, the line width of the electroconductive line 650 is made thick compared with the line width of the electroconductive line 660. Specifically, this is because the number of the heat generating elements 620 connected with the electroconductive line 650 is larger than the number of the heat generating elements 620 connected with the electroconductive line 660 and an amount of the current flowing through the electroconductive line 650 is large compared with an amount of the current flowing through the electroconductive line 660. Further, the heater in ...

embodiment 3

[0140]A heater according to Embodiment 3 of the present invention will be described. FIG. 12 illustrates a structure of a heater 600 in this embodiment. FIG. 13 is an illustrates an effect in this embodiment. FIG. 16 illustrates a state of a temperature distribution of the heater 600 in each of Embodiment 3 and Comparison Example 1. In FIG. 17, (a) illustrates a constitution of a first modified embodiment, and (b) illustrates a constitution of a second modified embodiment.

[0141]In Embodiment 1, the line width of the electroconductive line 640 is made thick compared with the line width of the electroconductive lines 650, 660. In Embodiment 3, in addition to the constitution of Embodiment 2, the line width of the electroconductive line 660b is made thick compared with the line width of the electroconductive line 660a.

[0142]Specifically, a length of a path of the electroconductive line 660b connecting the electrical contact 661b and the heat generating elements 620k, 620l is longer th...

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Abstract

A heater includes: a substrate; a first electrical contact; second electrical contacts; first electrode portions and second electrode portions; heat generating portions; a first electroconductive line portion electrically connecting the first electrical contact and the first electrode portions; and a second electroconductive line portion electrically connecting one of the second electrical contacts and a part of the second electrode portions. A cross-sectional area of a portion, of the first electroconductive line portion, into which all of currents flowing through the first electrode portions merge when the currents flow from the first electrode portions toward the first electrical contact is larger than a cross-sectional area of a portion, of the second electroconductive line portion, into which all of currents flowing through the part of the second electrode portions merge when the currents flow from the part of the second electrode portions toward the one of second electrical contacts.

Description

FIELD OF THE INVENTION AND RELATED ART[0001]The present invention relates to a heater for heating an image on a sheet and an image heating apparatus provided with the same. The image heating apparatus is usable with an image forming apparatus such as a copying machine, a printer, a facsimile machine, a multifunction machine having a plurality of functions thereof or the like.[0002]An image forming apparatus is known in which a toner image is formed on the sheet and is fixed on the sheet by heat and pressure in a fixing device (image heating apparatus). As for such a fixing device, a type of fixing device is proposed (Japanese Laid-open Patent Application 2012-37613) in these days in which a heat generating element (heater) is contacted to an inner surface of a thin flexible belt to apply heat to the belt. Such a fixing device is advantageous in that the structure has a low thermal capacity, and therefore, the temperature rise to the fixing operation allowable is quick.[0003]Japanese...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H05B1/02G03G15/20H05B3/22
CPCH05B1/0241H05B3/22G03G15/2053G03G15/2017G03G15/2042G03G2215/2035H05B2203/006H05B3/20
Inventor KAKUBARI, KOICHINAKAYAMA, TOSHINORITAKADA, SHIGEAKITAMAKI, MASAYUKIAKIYAMA, NAOKIASAKA, AKESHI
Owner CANON KK
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